They labored for 8 years, working around the clock, building the largest concrete structure in the world since the ancient pyramids of Egypt, was such a monumental task ever been undertaken.
2
金字塔是古埃及人非凡工程技术的明鉴。
The pyramids are an eloquent testimony to the ancient Egyptians' engineering skills.
《牛津词典》
3
没人知道古埃及人是如何在开罗附近建造金字塔的。
No one is sure how the ancient Egyptians built the pyramids near Cairo.